Glass-drawing machine.



I PATENTBD OCT. 18, 1904.

GI H1 GLASS DRAWING MACHINE.

APPIQIUATION FILED IAR. 3. 1904.

N0 MODEL.

UNITED STATES Patented October 18, 1904.

PATENT OFFICE.-

GEORGE H. HARVEY, OF GLENFIELD, PENNSYLVANIA.

GLASS-DRAWING MACHINEIRJEIBSUED SPECIFICATION forming part of Letters Patent No; 772,510, dated October 18, 1904. Application filed March 8, 1904. Serial No. 196,256. \No model- To all whom it may concern.-

Be it known that I, GEoReE H. HARVEY, a citizen of the United States, residing in Grlenfield borough, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Glass-Drawing Machines, of which the following is a specification.

In the accompanying drawing the view shows a portion of a glass-drawing machine in vertical section.

The object of my in vention, generally stated,

is to provide means whereby glass sheets in.

hollow form can be drawn from a receptacle which is unobstructed by air-passages therethrough and also means for preventing a circulation ofair throughout the interior of the gatherer. I

In the form of gatherer in use at present the air-supply intended to prevent the cylinder of glass from collapsing is discharged through a pipe connected to the gatherer. The circulation is very irregular, and after the gatherer arises from within the orifice formed by the cooler the gathering edge gen erally cools 01f, and its cooling is hastened by the circulation of the air-current through the gatherer and out the escape-port. It is evident that the chilling and consequent contraction of the gatherer would cause the pendent glass cylinder to crack ofl and drop from the gatherer, thus not only ruining the draw of.

glass, but endangering the operatives and the machine. This danger frequently occurs, and it is my object to prevent such difiiculties, as will morev clearly appear from the detailed description below and the drawings which, however, are merely illustrative of the principles of my invention in general.

Glass 1 in a liquid or semiliquid condition is contained in a receptacle 2, which receptacle may be of any desired'design.

3 represents a cooler having an annular chamber 1, inlet-pipe 5, and outlet-pipe 6 for the admission and discharge of a cooling medium.

7 is a gatherer having eyelets 8 8 or other suitable means for attaching the hoisting mechanism (not shown) used for raising and lowering the gatherer.

9 is an orifice through which pendent tube 10 passes. Tube 10 has a piston 11 secured to its upper extremity, having a vertical movement in cylinder 12. 13 is an inlet-pipe, and 14 an orifice in said cylinder. Tube 15 passes through tube 10, but is of a somewhat less diameter, so that a passage 16 is formed within tube 10 exterior to tube 15 and surrounding the same.

17 represents a deflector supported by a lug 18, said lug being secured at the lower end of tube 15 by means of a rivet 19.

20 and 21 represent annular rings which arev rigidly secured to tubes 10 and 15 and hlave ports 22 and 23 passing vertically through t 1cm.

Above the cylinder 11 is located a second cylinder 241, which has an inlet 25 and an airvent 26. A piston 27 rigidly secured to the tube 15, has a vertical movement in said cylinder. The upper end of tube 15 extends through the cylinder 24, and a flexible pipe 28 is secured thereto. This pipe is connected to a source of gaseous supply and has sufficient slack to permit the required travel of the tube 15 without detaching the flexible pipe from said tube.

The general operation is as follows: Assuming that the glass 1 in the receptacle 2 is in a condition suitable for drawing in hollow form and that a cooling medium is circulate ing through the chamber 4: of the cooler 3, the operator then lowers the gatherer 7 by suitable means (not shown) secured in the eyelets 8 8 within the orifice formed within the annular cooler 3 and until the rim of the I After the glass adheres thereto the gatherer 7 is raised at the speed best suited to cause the pendent glass. adhering thereto to be raised therewith and of a uniform thickness. A gaseous fluid under pressure passes down through tube 15 and is discharged against the deflector 17, which causes the current to be deflected laterally toward theline of juncture of the walls of the cylinder of glass and the glass contained in the receptacle, thereby preventing ripples or creases in the body of the glass contained in the receptacle, which would occur if no means were provided to defleet the gaseous fluid laterally as it is discharged from the tube. By the use of the deflector the tube 15 is enabled to discharge its fluid close to the glass contained in the receptacle, which aids in preventing the glass cylinder from contracting at its base. After the cylinder is filled with gaseous fluid the surplus passes up through the passage 16, formed between the walls of the two tubes, and throughports 22 and 23 out into the space within the cylinder 12 above the piston l1, and thence by orifice 14 into the open air. It is to be understood that as the cylinder of glass increases in length during the process of drawing the volume of gaseous fluid within the draw isinereased. After the gatherer 7 and the pendent glass adhering thereto have been drawn up the predetermined height the pendent glass is ready to be severed from the glass contained in the receptacle. As will be noted, there is no direct circulation of gaseous fluid around the interior of the gatherer7as would occur if the discharge were directly through the gatherer instead of pendent tube 10. Thus I form a cushioning of the gaseous pressure in the gatherer and above the lower extremities of tubes 10 and 15 after the gatherer passes from without the orifice formed by the annular cooler 3, and as the heat rises from the glass in the receptacle into theinterior of the draw it is collected in this cushioning-space and tends to keep the gatherer from chilling and contracting, which would otherwise result in the pendent glass breaking off at its junction with the gatherer. Before the glass is detached from the gatherer and after the draw is finished the operator permits a fluid under pressure to pass through pipe 13, then into cylinder 12, and discharge below the piston 11, which causes said piston to travel upwardly, carrying with it the tubes 10 and 15 and also the piston 27. After the tubes and deflector have cleared the top of gatherer '7 the gatherer and glass can beremoved, as desired, from alineinent with the tubes and another gatherer substituted. The operator then releases the pressure from under piston 11 and permits afluid under pressure to pass through pipe 25, then to cylinder 2A, and discharge above the piston 27, which causes the piston 27 to travel downward, thereby lowering the tubes 10 and 15 and the deflector 17 through the orifice 9 and the gatherer 7 and leaving them in position for the next draw, while the pistons have resumed their former positions.

What I claim is 1. In the manufacture of glass, a receptacle, a cooler, a hollow gatherer, a pendent tube extending through said gatherer and a second tube extending through said flrst tube for the purpose described.

2. In the manufacture of glass, a receptacle, acooler, a hollow gatherer, a pendent tube extending through said gatherer, a second tube extending through said first tube and a deflector supported by said second tube, for the purpose described.

8. In the manufacture of glass, a receptacle, a cooler, a hollow gatherer having an outlet therefrom. a pendent tube in said gatherer and a deflector secured to the exit of said tube.

1. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle and pondent means within the draw for the introduc tion and withdrawal of a gaseous fluid.

5. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle and having an opening therein for the discharge of a gaseous fluid into the draw and pendent means within said draw for the escape of the excess fluid.

6. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle, pendent primary and secondary means within the draw for the circulation of a gaseous fluid aml a deflector for the purposes (,lescribed.

7. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle, pendent means extending through said gatherer for the introduction and withdrawal of a gaseous fluid and secondary means for raising said pendent means from without said gatherer.

S. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle, pendent means capable of extending into said gatherer for the introduction and withdrawal of a gaseous fluid and secondary means for lowering said pendent means within said gatherer.

9. In the manufacture of glass, a receptacle, a cooler, a gatherer adapted to draw glass in hollow form from said receptacle, pendent means capable of extending into said gatherer for the introduction and withdrawal of a gaseous fluid and secondary means for reciprocating said pendent means.

Signed at Pittsburg, Pennsylvania, this 1st day of March, 190 1.

GEORGE H. HARVEY.

W itnesses:

J. H. HARRISON, EDWARD A. LAURENCE. 

